The ups and downs that come with growing up and being a young parent have captivated viewers of MTV's "Teen Mom" for three seasons, but the upcoming fourth season, which premieres with two back-to-back episodes June 12 at 10 p.m. ET/PT on MTV, will be the last to feature the original cast — Maci Bookout, Farrah Abraham, Amber Portwood and Catelynn Lowell.

While the televised story of these four young mothers, who first shared their stories in the first season of "16 and Pregnant," and their struggle to navigate their teens and early twenties with toddlers in tow is coming to a close, the franchise will continue, with premiere dates for "Teen Mom 2" and "Teen Mom 3" to be announced at a later date.

"We're incredibly thankful to these young women for bravely sharing their stories with our audience to help make an impact on teen pregnancy prevention," said Lauren Dolgen, MTV's senior vice president of series development. "This season will be an intense rollercoaster as we say goodbye to the cast who started it all — since the first season of '16 and Pregnant,' millions have tuned in to see the difficulties, joys and sorrows these young mothers have faced."

The final season of "Teen Mom" promises to be as captivating as those that preceded it as Farrah strives for independence, moving with her daughter Sophia to Florida, Catelynn and her fiancé Tyler near graduation and continue to deal with the impact of their decision to put their daughter up for adoption, Amber is overwhelmed by her emotional struggles and turbulent relationship with Gary and enters rehab and Maci tries to strike a co-parenting balance with her ex Ryan while trying to move on with new boyfriend Kyle.

Fans can visit MTV.com for sneak peeks of the show, including bonus and extended scenes and exclusive interviews with the moms.